Please see this Duo support article for resolution. Support If you require assistance with Duo, please submit a help request.

If you cannot authenticate to Duo, please submit a help request. Support If you require assistance with Duo, please submit a help request.

You can use Duo Restore to back up your Duo Mobile app, and restore it to the same or different device. Please see this Duo Support article for more information on configuring and using Duo Restore. Support If you require assistance with Duo, please submit a help request.

The initial setup of Duo requires you to authenticate with each application (Outlook, Teams, etc.) individually. After the initial setup, applications will “save” your login information. Support If you require assistance with Duo, please submit a help request.

This error is frequently caused by incorrect location, date, time or timezone settings on your device that do not match your device's physical location. To resolve this error, please ensure that your device's location, date, time and timezone settings are correct before attempting to log into a Duo-protected application. In some cases, you may need to reboot your device after changing these settings. Support If you require assistance with Duo, please submit a help request.

Information on security keys for students, faculty, and staff across CSU campuses. Applicable to: Fort Collins, Pueblo, Spur, System Affiliation: Students, Faculty, Staff Description This guide provides essential information about security keys at CSU. Security keys enhance account protection by providing two-factor authentication (2FA) and reducing the risk of unauthorized access. Features What is a security key? A two-factor authentication (2FA) security key is a physical device designed to strengthen account security by pairing a password (something you know) with a physical key (something you have) during the login process. To use it, you plug the key into a USB port, tap the contact when prompted, and you will access your account. The key generates a unique cryptographic response to verify your identity, making it highly effective against phishing and other online threats. It supports widely adopted FIDO standards, works across multiple platforms, and functions offline without needing batteries or charging, ensuring reliability and ease of use. Do I need a security key for Duo 2FA? If you prefer not to use the Duo Mobile app on your smartphone or do not have access to a smartphone, you will need to use a hardware security key for two-factor authentication. Security keys are physical devices that provide an additional layer of security by verifying your identity during the login process. Security keys work by generating a unique code or using protocols like FIDO (Fast Identity Online) to authenticate access when plugged into a computer or used via NFC. To use a security key with Duo, ensure the key meets the necessary specifications, such as compatibility with Duo's security protocols and your device's operating system. Approved standards and security keys Personal keys are available for purchase at online retailers, RamTech, or local technology stores. For departmental purchases, use the shop catalogs to ensure proper procurement procedures are followed. Once you have a security key, it can be enrolled and configured using the install and configuration instructions below. Pueblo- You can also reach out to the IT Help Desk: Phone: 719-549-2002 Location: First floor of the Library and Academic Resource Center (LARC), Office 130 Fort Collins- You can also reach out to the IT Help Desk: Phone: 970-491-7276 Location: 1st floor of the Morgan Library. Office 189 Suggested security keys YubiKeys – YubiKey 5C NFC FEITIAN Key – FEITIAN Single Button FIDO Key Duo Hardware Token – These can be ordered and purchased from RamTech and picked up on the Fort Collins campus or delivered and picked up at the CSU Pueblo IT Help Desk. Outcome After reading this guide, users will understand what security keys are, their benefits, where to purchase them.

Devices running iOS 15 or iPadOS 15 may display the Duo Mobile app and Duo Mobile push notifications in a language other than your device's language, typically German. This is a problem with iOS 15 and iPadOS 15, and can only be fixed by updating the device to at least iOS 16 or iPadOS 16. If the affected device cannot be updated beyond iOS 15 or iPadOS 15, this issue cannot be fixed. Additionally, the Duo Mobile app will no longer support iOS 15 and iPadOS 15 after February 17, 2025. The Duo Mobile app will continue to function on iOS 15 or iPadOS 15 devices on which it is already installed, but it will no longer receive security updates or technical support and will not be available in the App Store.